import { Component } from 'react';
class DemoState extends Component {
    constructor () {
      super()
      this.state = {
        count: 10
      }
    }
    render() { 
        return (<div className='demo-state'>
         <h3>01.定义状态</h3>
         count累加:{this.state.count}
         
        </div>)
    }
}
 
export default DemoState;